Definition of Heady

Adjective: heady (headier,headiest) he-dee

Marked by the exercise of good judgment or common sense in practical matters
"heady use of one's money";
- judicious, wise
Extremely exciting as if by alcohol or a narcotic
- intoxicating
Marked by defiant disregard for danger or consequences
"heady enough to try to seize the gun from the hijacker";
- foolhardy, rash, reckless